Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36
Chrome 86
Windows
Desktop
4 years ago
Test name Executions per second
undefined 2490407.5 Ops/sec
typeof 6930160.0 Ops/sec
in 6958169.5 Ops/sec
hasOwnProperty 6296253.5 Ops/sec
bool 7565291.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool